CHAPTER 3 Mole concept, Chemical Formula and Equation QUIZ 1

What is the formula of potassium ion?

•  $P^+$  

•  $K^+$  

•  $P^{2+}$  

•  $K^{2+}$  

What is the name of  $Cu^{2+}$  ion?

• Copper 

• Copper ion

• Copper(I) ion

• Copper(II) ion

What is the formula of hydroxide ion?

• $H^-$

• $O^{2-}$

• $OH^-$

• $NO_3^-$

What is the formula of aluminium ion?

•  $Al^{ }$  

•  $Al^+$  

•  $Al^{2+}$  

•  $Al^{3+}$  

Calculate the relative molecular mass of  $NO_2$  .

[RAM: N=14; O=16]

• 44

• 46

• 60

• 448

What is the formula of sulphate ion?

•  $SO_4^{2-}$  
  

•  $PO_4^{3-}$  

•  $NO_3^-$  

•  $CO_3^{2-}$  

What is the formula of magnesium ion?

•  $Mg^+$  
  

•  $Mg^{2+}$  
  

•  $Mn^+$  
  

•  $Mn^{2+}$  
  

What is the formula of silver ion?

•  $Sn^{ }$  
  

•  $Sn^{2+}$  
  

•  $Ag^+$  
  

•  $Ag^{2+}$  
  

Calculate the relative formula mass of  $Cu\left(OH\right)_2$  .

[RAM: Cu=64; O=16; H=1]

• 162

• 98

• 83

• 82

What is the formula of zinc ion?

•  $Zn^{2+}$  
  

•  $Sn^{2+}$  
  

•  $Mg^{2+}$  
  

•  $Ca^{2+}$